US3495438A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for determining productive characteristics of well formation
Assignee: HAMMIT AND MANGUM SERVICE CO Inc
•
Filing: 1967-06-09
•
Granted: 1970-02-17
•
Expires: 1987-06-09
Abstract
No abstract record available.
Inventors
- 👤 Raymond W Mangum
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:50
CPC Classifications
E; E21; E21B; E21B49/00; E21B49/005; G; G01; G01N; G01N15/00; G01N15/08
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2531083A
Cited
US2711644A
Cited
US2749748A
Cited
US2883856A
Cited
DE1241155B
Cited
FR1406004A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-02-16 | 1973-08-18 | 1974-02-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-02-16 | 1977-08-18 | 1978-02-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-02-16 | 1981-08-18 | 1982-02-17 | $7700.00 | Window Closed / Lapsed |